Analysis of observed rapid increases in surface wind speed
Analysis of observed rapid increases in surface wind speed
复制标题
观测到的表面风速快速增加的分析
DOI：
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发表时间：
2018
影响因子：
8.9
通讯作者：
H. Ólafsson
中科院分区：
文献类型：
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作者：
Florian Ruff;H. Ólafsson
研究人员对 1993 年 1 月至 2017 年 3 月期间冰岛 200 个气象站每小时 2100 万次观测的数据库进行了探索，以评估风速的快速增加。夏季，大风在下午比夜间更频繁，而风速快速增加的情况在夜间稍微频繁。西风风速快速增加的频率相对较高，而东风风速快速增加的频率相对较低。这可以通过气旋的形式和轨迹来解释。风速快速增加在冰岛北部尤其频繁。它们发生在从中部高地吹来的风中，通常出现在稳定的分层气团中。对各个站点的风向分析表明，地形影响很大，强风事件的风向分布可能与风速快速增加的风向分布有很大不同。然而，尚未发现附近山脉的高度和距离与风速快速增加的频率之间存在简单而普遍的联系。在风速快速增加频率较高的站点，下坡流是一个非常重要的影响因素，而间隙风和角风则不是。
A database of 21 million hourly observations from 200 weather stations in Iceland within the period from January 1993 until March 2017 is explored to assess rapid increases of wind speed. In the summer, strong winds are more frequent in the afternoon than at night, while rapid increases in wind speed are slightly more frequent at night. Westerly winds have a relatively high frequency of rapid increases in wind speed, while easterly winds have a relatively low frequency of rapid increases in wind speed. This can be explained by the form and tracks of cyclones. Rapid increases in wind speed are particularly frequent in northern Iceland. They occur in winds blowing from the central highlands and typically in stably stratified air masses. Analysis of winds at individual stations reveals a large impact of topography and that the wind direction distribution for strong wind events may be quite different from the wind direction distribution for rapid increases in wind speed. However, a simple and general connection between the height and distance to nearby mountains and the frequency of rapid increases in wind speed has not been found. At stations with a high frequency of rapid increases in wind speed, downslope flow is a very important contributor, while gap and corner winds are not.
影响因子：
6.3
作者：
A. Blechschmidt;J. Kristjánsson;H. Ólafsson;J. Burkhart;Ø. Hodnebrog;P. Rosenberg
通讯作者：
A. Blechschmidt;J. Kristjánsson;H. Ólafsson;J. Burkhart;Ø. Hodnebrog;P. Rosenberg